JP2581430Y2 - Multi-point distance measuring device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-point distance measuring device which is used for a light-emitting type multi-point distance measuring device. .

[0002]

2. Description of the Related Art Conventionally, when a light emitting unit and a light receiving unit are horizontally arranged in front of a camera in a so-called multi-point AF (AUTO FOCUS) for measuring a distance of a plurality of points, so-called hollowing is prevented. Therefore, usually, a plurality of LEs, which are light emitting elements, are provided on the light emitting side.
The D element is arranged in the horizontal direction, and the PSD as the light receiving element is similarly arranged on the light receiving side in the horizontal direction. FIG. 4 is a three-side view of the above-mentioned conventional light receiving PSD package.
(A) is a front view, (B) is a side view, and (C) is a bottom view. In this PSD, a PSD element 51, which is a single element, is provided in a package 50, and mounting terminals 52, 53 are further provided in a vertical direction. When the light receiving element is constituted by a single PSD element 51 in this manner, noise components increase and the distance measurement accuracy deteriorates. Therefore, as shown in the three views of the PSD package in FIG. 5, depending on the number of distance measurement points (here, three points), the PSD element 56 of the light receiving element is set at a long distance.
If the elements are divided and arranged so that the distance can be measured from a short distance to a short distance, the elements become independent elements and the distance measurement accuracy is improved. In addition,
5A is a front view, FIG. 5B is a side view, and FIG. 5C is a bottom view, and reference numerals 57 and 58 denote mounting terminals. However, when the PSD element is divided as shown in FIG. 5, the light receiving package 55 becomes longer than that in FIG. 4, and it is obvious that the light receiving package 55 becomes larger by that amount, which is contrary to the miniaturization of the camera. Also, the PSD element is divided as shown in FIG.
In this case, the distance between the centers of the PSDs increases,
It is necessary to set the emission angle of the emission side beam larger than necessary.
is there. For example, with zoom (f110mm-f38mm)
If a PSD as shown in Fig. 5 is used for the impact camera,
Of course, the projection angle must be larger than necessary.
At the short focal length (f38mm), the projected beam is
Even at the long focal point (f110mm)
An adverse effect occurs in that it does not fit within the viewfinder. Therefore, it has been devised to arrange the PSD elements obliquely as shown in FIG. FIGS. 6A and 6B are three views showing the package outer shape of the PSD 60 in which three light receiving elements 62 are arranged obliquely with respect to the package 61, FIG. 6A is a front view, FIG. 6B is a side view, and FIG. Is a bottom view. Also, 63 and 64 in FIG.
Indicates a mounting terminal. The PSD 60 enables the package 61 to be reduced in size. However, when the PSD elements 62 are arranged obliquely in this way, the light-emitting LEDs also need to be obliquely arranged.

FIG. 7 is a perspective view showing an arrangement of a distance measuring unit of a multipoint distance measuring apparatus using the above-mentioned light emitting LED and light receiving PSD. FIG. 8 is a front view of the arrangement state. 7 and 8, three LED elements 67 are arranged in a lateral direction in a package 66. Mounting terminals 68 and 6 extending in a direction orthogonal to the direction in which the three LED elements 67 are arranged.
9 are provided. On the other hand, the light receiving PSD 6 shown in FIG.
In the case of 0, the three light receiving elements 62 are arranged obliquely because the package 61 is erected as shown in FIGS. Therefore, the LED 65 is a PSD
It is necessary to dispose the package 66 in a state of being inclined with respect to the axis J connecting with 60, and the three LED elements 67
As shown in FIG. As shown in FIGS.
A light-emitting lens 70 and a light-receiving lens 7
1 shall be provided.

[0004]

However, when the arrangement shown in FIGS. 7 and 8 is adopted, the element 6 in the light emitting LED 65 is not used.
7 are arranged in a direction orthogonal to or in the same direction as the extending direction of the mounting terminals 68, 69, the mounting terminals 68, 69
The vertical dimension X0 of 69 increases. Then, great restrictions are imposed on the upper and lower dimensions of the camera exterior body, which hinders downsizing of the camera. In addition, LED 65
Is mounted on the camera as shown in FIG.
It is apparent that the diagonal length X2 of the mounting substrate 80a is a vertical occupied dimension in the camera, and that it hinders downsizing of the camera in the height direction. . FIG. 10 shows the light emitting LED 65 and the light receiving P
PSD60 'in which the extension direction of the mounting terminal of SD60 is changed.
FIG. 8 shows a state in which the camera body is arranged on the camera in the manner shown in FIG.
The light emitting LED 65 is attached to the mounting board 80a in the state of FIG. 9 and mounted on the “a” portion in the camera. Light receiving P
The SD 60 'is mounted on the mounting board 80b and mounted on the "b" portion in the camera. In addition, the light receiving PSD 60 '
Are mounting terminals 64 'and 65' shown in FIG.
Extend in the left-right direction. A lens frame unit 82 and a zoom drive unit 83 are provided at the center, and a finder unit 84 and a strobe unit 85 are provided at the top. Those elements are the camera body 8
6 supported. In the conventional camera configured as described above, the dimension X4 in the height direction of the camera
Is the diagonal length X2 of the mounting substrate 80a of the LED 65.
As a result, wasteful space is generated and the size is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and the device in the package of the light emitting light emitting device and the arrangement of the mounting terminals are devised so that the device can be mounted on a camera. Up, down, or left and right so that the mounting terminals extend in the same direction.
Alternatively, it is another object of the present invention to provide a multi-point distance measuring device that can obtain a smaller occupied dimension on the left and right and facilitates downsizing of a camera.

[0006]

SUMMARY OF THE INVENTION A multipoint distance measuring apparatus according to the present invention is a light emitting type multipoint distance measuring apparatus, in which a plurality of light emitting elements for light projection are incorporated in a single package, and the package is provided with a plurality of light emitting elements. The plurality of light emitting elements are arranged in a row in a direction crossing a direction perpendicular to the extending direction of the mounting terminal.

[0007]

In a package in which a plurality of light emitting elements for light projection are arranged, a direction perpendicular to the extending direction of the mounting terminals is
Even if the plurality of light emitting light emitting elements are arranged side by side in a crossing direction, and the light emitting elements are arranged obliquely, the mounting terminals can be arranged vertically or horizontally. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. Regarding a multi-point distance measuring device showing one embodiment of the present invention,
This will be described with reference to FIGS. 1 to 3, the same components as those described in the conventional example are denoted by the same reference numerals. FIG. 1 is a perspective view showing a light emitting LE incorporating a plurality of light emitting elements for light constituting the multipoint distance measuring apparatus according to the present embodiment.
Light receiving PSD incorporating D1 and a plurality of light receiving elements
Is a positive plane view shows the placement within the camera 60 '. In addition,
A light-emitting lens 70 and a light-receiving lens 71 are provided on the front surfaces of the light-emitting LED 1 and the light-receiving PSD 60 '. FIG.
As shown in FIG.
Inside, three LED elements 3 are arranged diagonally. Further, mounting terminals 4 and 5 are provided extending in a direction intersecting the direction in which the LED elements 3 are arranged. On the other hand, package
The cage 61 and the light receiving PSD 60 'are as shown in FIG. 6A, in which the PSD elements 62 are arranged obliquely and the mounting terminals 63' and 64 'extend in the left-right direction. . The mounting terminals 4, 5 and 63 ', 64'
The extension direction when mounting is the LED1 for projection and the PSD for reception.
Suppose that it is parallel to the axis J connecting 60 '. And LE for floodlight
D1 is mounted on the mounting board 10a in the state of FIG. 2 and mounted in the camera. As shown in FIG. 2, since the mounting terminals 4 and 5 extend in the horizontal direction, the space for disposing the light emitting LED 1 is a width of the mounting substrate 10a which is relatively narrow in a vertical direction. X3 would be fine. The dimension of the width X3 is considerably shorter than the height X2 of the conventional mounting board 80a shown in FIG. This difference is caused by the height X1 of the LED 1 itself (see FIG. 1) and the oblique height X0 to the mounting terminal of the conventional LED 65 (FIG. 8).
), Which is effective in reducing the size of the camera.

FIG. 3 is a diagram showing the exterior of the multi-point distance measuring apparatus according to the present embodiment including the other elements of the camera when the light emitting LED 1 and the light receiving PSD 60 'are arranged as shown in FIG. It is shown with the body removed. And the light emitting LED 1 is
In the state shown in FIG. 2, it is mounted on the "c" part in the camera which is mounted on the mounting substrate 10a. The light receiving PSD 60 'is mounted on the mounting board 10b and mounted on the "d" portion in the camera. In addition, the other components of the lens frame unit 82 and thereafter are the same as those described in the conventional example of FIG. In the camera to which the multi-point distance measuring apparatus of the present embodiment configured as described above is applied, the upper and lower occupied dimensions of the LED 1 mounting are the width X2 of the mounting board 10a, so that the camera exterior body 11 The dimension X5 in the height direction is reduced to a very small dimension as compared with the height X4 of the conventional camera shown in FIG.

As described above, the light emitting LED 1 and the light receiving PSD 60 'of the multipoint distance measuring apparatus of the present embodiment are the same as the light emitting LED 1
Although the plurality of LED elements 3 are arranged obliquely and the mounting terminals 4.5 extend in the horizontal direction, the height occupied dimension X3 of the mounting board 10a in the camera in the height direction is very small. To narrow. Further, the dimensions of the mounting substrate 10b of the light receiving PSD 60 'disposed at the opposed horizontal position can be made substantially equal, so that it can be efficiently stored and is effective for downsizing the camera.

[0011]

As described above, the light emitting element for projection used in the multipoint distance measuring apparatus according to the present invention can be used in a package in which a plurality of light emitting elements for light emission are provided, in a direction in which the mounting terminals extend.
The plurality of light emitting elements for light emission are arranged side by side in a direction intersecting with a direction orthogonal to the orthogonal direction ,
When mounted on a camera, even if the light emitting element for light projection is arranged obliquely, the extension direction of the mounting terminal is, for example,
It is possible to keep the height of the camera exterior body lower by aligning it in the horizontal direction, increase the mounting density of components inside the camera, and be effective for miniaturization of the camera. It has a great effect.

[Brief description of the drawings]

FIG. 1 is a front view showing an arrangement state of a light emitting element package for light projection and a light receiving element package for light reception of a multipoint distance measuring apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a mounting state of a light emitting element for light projection of the multipoint distance measuring apparatus of FIG. 1 to a mounting board.

FIG. 3 is a front view showing a mounting state of the multipoint distance measuring apparatus of FIG. 1 on a camera.

FIG. 4 is a three-side view of a light-receiving light-receiving element package using a single type PSD element of a conventional multipoint distance measuring apparatus, and FIG.
Is a front view, (B) is a side view, and (C) is a bottom view.

FIG. 5 is a three-sided view of a light-receiving light-receiving element package using a three-division PSD element of a conventional multipoint distance measuring apparatus, and FIG.
Is a front view, (B) is a side view, and (C) is a bottom view.

FIG. 6 is a three-view drawing of a light-receiving light-receiving element package using three-division PSD elements arranged obliquely in a conventional multipoint distance measuring apparatus, wherein (A) is a front view and (B) is a side view; FIG. 7C is a bottom view.

FIG. 7 is a perspective view showing an arrangement state of a light receiving element package and a light emitting element package in a conventional multipoint distance measuring apparatus when the three-division PSD element of FIG. 6 is used as a light receiving element.

FIG. 8 is a front view of an arrangement state of the conventional multipoint distance measuring apparatus of FIG. 7;

FIG. 9 is a diagram showing a state where the light emitting element for light projection of the conventional multipoint distance measuring apparatus shown in FIG. 7 is mounted on a mounting board.

FIG. 10 is a front view showing a state where the conventional multipoint distance measuring apparatus of FIG. 7 is mounted on a camera.

[Explanation of symbols]

3 LED light emitting element (a plurality of light emitting light emitting elements) 4, 5 mounting terminals

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-291040 (JP, A) JP-A-63-291043 (JP, A) JP-A-57-64711 (JP, A) JP-A-62 203011 (JP, A) Hikaru 1-140115 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G02B 7/32 G01C 3/06

Claims (1)

(57) [Scope of request for utility model registration] 1. A projection type multi-point distance measuring device, wherein a plurality of light emitting elements for light projection are incorporated in a single package, and the light emitting elements are directly connected to the extending direction of mounting terminals of the package.
Multi-point distance measuring device characterized by the direction which intersects the direction orthogonal was column set the plurality of light emitting elements.